Some days ago I purchased a few Arduino MKR GSM 1400 together with some Arduino SIM cards, in order to use them for a university project. So far, I have managed to connect one of them - as a test version - with the IoT cloud and Google Spreadsheets through a webhook, which is really convenient.
However, one of the issues I am facing in this project is the optimisation of the data usage of the SIM connection, as they are limited to 5MB per month. The project idea is to collect data samples from 4-5 sensors every 15 min, and then send this data as a hexadecimal string to the cloud. However, even the message is being compressed as a hexadecimal code, I guess that there is a lot more data being sent by the connection itself. Maybe I could send messages i.e. every hour with data taken every 15 min all together in one string, but I’m not sure if it’s better… Do you know if it could be possible to see the data usage per message? Or if there is a optimal message size or sending frequency?
So far the only information that I see it’s the overall data consumption of the SIM, but it is not being very useful as it only has one decimal and I can’t really tell how much of it is being used per message. Attached you can find the picture of what I refer to, in the device manager.
Thanks in advance for the help!